Unless it's a mega minter with a tiny amount of babying miles on it, I would personally just use the car as a trade-in bargaining chip on the 7R. Unless of course you want to hold out for the best possible private sale....but that method comes with dealing with tyre-kicking morons unfortunately. Depends entirely on your patience and expectations.
If you're not desperate for the max price (and I'm guessing you're not going by what you're looking to replace it with), just get rid of it as a trade-in fella